DATEDIFF - 如何排除公司假期

Question

我有一个公司日历表，其中包含公司假期的指标。我需要从 datediff 中排除周末和假期。以下是我的完整查询。

例如 警报日期 2016 年 12 月 23 日 创建日期 2016 年 12 月 28 日 公司假期 12/26/16

下面的查询应该显示 2 个工作日，而不是 3 个。在这个查询下面，我将发布我遇到问题的假日文章。

SELECT 
A.ALERT_UID,
A.ALERTCREATEDT_MMDDYYYY, 
S.CreatedDate,

DATEDIFF(DD,A.ALERTS_CREATE_DT,S.CreatedDate) 
           -(DATEDIFF(WK,A.ALERTS_CREATE_DT,S.CreatedDate) * 2)  
             -(CASE WHEN DATENAME(DW,A.ALERTS_CREATE_DT)   = 'Sunday'  THEN 1 ELSE 0 END) 
                                                                             -(CASE WHEN DATENAME(DW,S.CreatedDate) = 'Saturday' THEN 1 ELSE 0 END) AS BusinessDays

,DATEDIFF(DD,A.ALERTS_CREATE_DT,S.CreatedDate) 
           -(DATEDIFF(WK,A.ALERTS_CREATE_DT,S.CreatedDate) * 2)  --HOW MANY WEEKEND DAYS PASSED BY
           -(CASE WHEN DATENAME(DW,A.ALERTS_CREATE_DT) = 'Sunday' THEN 1 ELSE 0 END) 
           -(CASE WHEN DATENAME(DW,S.CreatedDate) = 'Saturday' THEN 1 ELSE 0 END) 
           -(CASE WHEN CAL.GRH_HOLIDAY_IND = 'Y' AND CAL.CALENDAR_DATE BETWEEN CAST(A.ALERTS_CREATE_DT AS DATE) AND CAST(S.CreatedDate AS DATE) THEN 1 ELSE 0 END )AS BusinessDays_ExcludingHolidays

FROM  A
FULL OUTER JOIN  S ON A.id= S.id 
INNER JOIN CAL ON  A.ALERTCREATEDT_MMDDYYYY = CAL.CALENDAR_DATE  

WHERE 1=1
AND S.CreatedDate IS NOT NULL
AND A.ALERT_UID = '2'

以下查询中的困难：

-(CASE WHEN CAL.GRH_HOLIDAY_IND = 'Y' AND CAL.CALENDAR_DATE BETWEEN CAST        (A.ALERTS_CREATE_DT AS DATE) AND CAST(S.CreatedDate AS DATE) THEN 1    ELSE 0 END )AS BusinessDays_ExcludingHolidays

Answer 1

您在A.ALERTCREATEDT_MMDDYYYY = CAL.CALENDAR_DATE 上加入您的日历，因此您的表情

-(CASE WHEN CAL.GRH_HOLIDAY_IND = 'Y' 
        AND CAL.CALENDAR_DATE BETWEEN CAST(A.ALERTS_CREATE_DT AS DATE) 
                                AND CAST(S.CreatedDate AS DATE) 
    THEN 1
    ELSE 0 
END

只有在A.ALERTCREATEDT_MMDDYYYY 是假期时才会返回 1。我希望你想要这样的东西：

SELECT  A.ALERT_UID,
        A.ALERTCREATEDT_MMDDYYYY, 
        S.CreatedDate,
        cal.BusinessDays,
        cal.BusinessDays_ExcludingHolidays
FROM  A
FULL OUTER JOIN  S ON A.id= S.id 
CROSS APPLY
(   SELECT  TotalDays = COUNT(*),
            BusinessDays = COUNT(CASE WHEN cal.IsBusinessDay = 1 THEN 1 END),
            BusinessDays_ExcludingHolidays = COUNT(CASE WHEN cal.GRH_HOLIDAY_IND = 'Y' THEN 1 END)
    FROM    CAL 
    WHERE   cal.CALENDAR_DATE BETWEEN CAST(A.ALERTS_CREATE_DT AS DATE) AND CAST(S.CreatedDate AS DATE)
) cal
WHERE   1=1
AND     s.CreatedDate IS NOT NULL
AND     s.ALERT_UID = '2';

在这里，我假设您的日历表作为 IsBusinessDay 列来标记工作日（或类似的东西 - 如果它不应该）。